BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read




 

Post Reply
 
Thread Tools Search this Thread
      07-19-2020, 03:17 PM   #1
rapter
Lieutenant
41
Rep
437
Posts

Drives: 1(M)other f*^#er of a car
Join Date: Nov 2010
Location: Canada

iTrader: (0)

Brake Fluid selection, does it matter?

Hi Everyone

is there a right and wrong dot 4.0 fluid to be used on our cars?

I was thinking of buying something from amazon such as:

https://www.amazon.ca/ATE-706202-Ori...ke-Fluid/dp/B0

https://www.amazon.ca/Pentosin-12041...s%2C155&sr=8-5

https://www.amazon.ca/Pentosin-12241...s%2C155&sr=8-9
Appreciate 0
      07-19-2020, 07:19 PM   #2
nachob
Brigadier General
United_States
1887
Rep
4,074
Posts

Drives: 2011 1M, 2003 330i ZHP
Join Date: Apr 2008
Location: California

iTrader: (5)

Quote:
Originally Posted by rapter View Post
Hi Everyone

is there a right and wrong dot 4.0 fluid to be used on our cars?

I was thinking of buying something from amazon such as:

https://www.amazon.ca/ATE-706202-Ori...ke-Fluid/dp/B0

https://www.amazon.ca/Pentosin-12041...155&sr=8-5

https://www.amazon.ca/Pentosin-12241...155&sr=8-9
Lol. I just went trough this myself. The dealer was closed and I had the car on jack stands. The Pentosin Blue is for older cars. If you want Pentosin get Pentosin LV. BMW switched to LV. low viscosity a long time ago. Honestly I don't think it will cause anything major but the ABS is more advanced and does more things now so the Low Viscosity works better. I found it at auto zone in one litter bottle and did my entire flush.

Pentosin LV for the win or get BMW which is probably the same stuff.
Appreciate 0
      07-23-2020, 08:55 PM   #3
1mGator
1mGator
1mGator's Avatar
United_States
124
Rep
557
Posts

Drives: Valencia 1M
Join Date: Dec 2010
Location: Aventura, Florida

iTrader: (0)

Quote:
Originally Posted by nachob View Post
Lol. I just went trough this myself. The dealer was closed and I had the car on jack stands. The Pentosin Blue is for older cars. If you want Pentosin get Pentosin LV. BMW switched to LV. low viscosity a long time ago. Honestly I don't think it will cause anything major but the ABS is more advanced and does more things now so the Low Viscosity works better. I found it at auto zone in one litter bottle and did my entire flush.

Pentosin LV for the win or get BMW which is probably the same stuff.
Just did mine last month with Pentosin Lv = perfect👌
Appreciate 1
nachob1887.00

      08-17-2020, 04:00 AM   #4
Boost3d_1M
Private
South Africa
56
Rep
61
Posts

Drives: E82 1M
Join Date: Apr 2019
Location: South Africa

iTrader: (0)

I went with Motul RBF660, only thing i am not sure of or cant find info on this product is, is how often does it need to be replaced( every 6months, annually, every two years etc etc) Iv done about 200km on the car this year only, so would have to replace it because of Time, not usage.
Appreciate 0
      08-17-2020, 10:08 AM   #5
nachob
Brigadier General
United_States
1887
Rep
4,074
Posts

Drives: 2011 1M, 2003 330i ZHP
Join Date: Apr 2008
Location: California

iTrader: (5)

Quote:
Originally Posted by Boost3d_1M View Post
I went with Motul RBF660, only thing i am not sure of or cant find info on this product is, is how often does it need to be replaced( every 6months, annually, every two years etc etc) Iv done about 200km on the car this year only, so would have to replace it because of Time, not usage.
BMW recommends every two years based more on time than miles as the real issue is that it draws water over time. If you track it, extreme heat might cause some breakdown also but DOT4 has similar properties so two years is plenty good. Once a year can't hurt the car but it does impact the environment since we have to dispose of that stuff.

Motul mostly caters to high performance where BMW caters to the masses that sometimes don't change on two year intervals so if your car is mostly sitting around, you are probably better off with BMW or Pentosin LV for sitting than more exotic high performance blend that was designed for higher heat loads.

Now the following is just an assumption so I am mentioning this since I don't have time right now to research it. So for disclosure this is my assumption:

The higher the heat load a brake fluid can handle, the shorter change interval recommended. DOT 3 can go 3 years, DOT4 2 Years. So I assume that a fluid with more thermal capacity would have substances that draw more water and have shorter life than one that draws less water. I think BMW and Pentosin LV achieve a durability and temperature balance that would probably be best for a car that sits. IMHO.
Appreciate 1
      08-18-2020, 02:29 AM   #6
Boost3d_1M
Private
South Africa
56
Rep
61
Posts

Drives: E82 1M
Join Date: Apr 2019
Location: South Africa

iTrader: (0)

Quote:
Originally Posted by nachob View Post
BMW recommends every two years based more on time than miles as the real issue is that it draws water over time. If you track it, extreme heat might cause some breakdown also but DOT4 has similar properties so two years is plenty good. Once a year can't hurt the car but it does impact the environment since we have to dispose of that stuff.

Motul mostly caters to high performance where BMW caters to the masses that sometimes don't change on two year intervals so if your car is mostly sitting around, you are probably better off with BMW or Pentosin LV for sitting than more exotic high performance blend that was designed for higher heat loads.

Now the following is just an assumption so I am mentioning this since I don't have time right now to research it. So for disclosure this is my assumption:

The higher the heat load a brake fluid can handle, the shorter change interval recommended. DOT 3 can go 3 years, DOT4 2 Years. So I assume that a fluid with more thermal capacity would have substances that draw more water and have shorter life than one that draws less water. I think BMW and Pentosin LV achieve a durability and temperature balance that would probably be best for a car that sits. IMHO.
Thank you so much for that very insightful post , i will be mindful of what you said and go back to using the OEM fluids especially since i dont have any real intention of tracking the car
Appreciate 1
nachob1887.00

Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 03:36 PM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST